package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import com.sky.utils.WeChatPayUtil;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
public class UserServiceImpl implements UserService {

    @Autowired
    private WeChatProperties weChatProperties;

    @Autowired
    private UserMapper userMapper;

    public static final String WX_LOGIN="https://api.weixin.qq.com/sns/jscode2session";


    /*
    * 获取openid
    * */
    private String getOpenid(String code){
        //调用微信接口服务获得当前用户的openId
        //添加登陆数据
        Map<String, String> map = new HashMap<>();
        map.put("appid",weChatProperties.getAppid());
        map.put("secret",weChatProperties.getSecret());
        map.put("js_code",code);
        map.put("grant_type", "authorization_code");
        //调用接口获取微信的登录验证
        String json = HttpClientUtil.doGet(WX_LOGIN, map);
        //解析json信息
        JSONObject jsonObject = JSON.parseObject(json);
        return jsonObject.getString("openid");
    }

    /*
    * 微信登录
    * */
    @Override
    public User wxLogin(UserLoginDTO userLoginDTO) {
        //调用方法获取openid
        String openid = getOpenid(userLoginDTO.getCode());
        //判断是否为空->登陆失败
        if(openid==null){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        //判断该用户是否为新用户
        User user = userMapper.selectByOpenid(openid);
        //如果是新用户自动注册用户
        if(user==null){
            user = User.builder()
                    .openid(openid)
                    .createTime(LocalDateTime.now())
                    .build();
            userMapper.insert(user);
        }
        //返回用户对象
        return user;
    }
}
